https://delta.chat/
https://delta.chat/en/help#e2ee
I gave it another try last week
It's still in development, it's not a fully fledged replacement for Matrix yet, but I could see it replace Signal at some point.
For a list of servers: https://chatmail.at/relays
Just gave a try to the "adding second device" feature, I got a network issue when trying to use the QR code, but the backup import worked flawlessly.
Icon base by Lorc under CC BY 3.0 with modifications to add a gradient
Just gave a try to the "adding second device" feature, I got a network issue when trying to use the QR code, but the backup import worked flawlessly.